FindMyMarathon / Race-day weather
Marine Corps Marathon Weather Forecast 2026 IS LIVE!
Check the Marine Corps Marathon weather for your time on the course.
Choose your start time and goal finish time for temperature, rain chance and wind. Free to use.
Your race details
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Your race forecast
Goal 2:00:00 Washington, DC local time
Start
7:20am- Wind
- 3 mph N
- Gusts
- 3 mph
- Humidity
- 91%
- Dewpoint
- 42°F
- Rain chance
- 0%
Halfway
8:20am- Wind
- 3 mph NNE
- Gusts
- 2 mph
- Humidity
- 89%
- Dewpoint
- 43°F
- Rain chance
- 0%
Finish
9:20am- Wind
- 4 mph NNE
- Gusts
- 2 mph
- Humidity
- 81%
- Dewpoint
- 45°F
- Rain chance
- 0%
Checkpoint colorsStartHalfwayFinish
Expect a partly cloudy start near the Pentagon/Route 110 start near 44°F, with temperatures rising to about 51°F by the finish. Partly cloudy conditions should hold for much of the day. Wind impact looks mixed rather than strongly favorable or strongly difficult over the full course. Overall, the temperature setup looks fairly manageable for steady pacing.
Temperature & rain during your race
Wind along the course
Start to Mile 5
Neutral
- Tailwind
- 3%
- Headwind
- 27%
- Gusts
- 3 mph
Miles 6 - 10
Neutral
- Tailwind
- 27%
- Headwind
- 17%
- Gusts
- 3 mph
Miles 11 - 15
Neutral
- Tailwind
- 3%
- Headwind
- 2%
- Gusts
- 2 mph
Miles 16 - 20
Neutral
- Tailwind
- 11%
- Headwind
- 4%
- Gusts
- 2 mph
Miles 21 to Finish
Neutral
- Tailwind
- 28%
- Headwind
- 9%
- Gusts
- 2 mph
What to expect
- The start should feel cool while you wait near the start area, so a throwaway layer could still be helpful before moving into your corral.
- Late-race conditions look relatively manageable, which should reward runners who stay patient through Halfway and the second half.
- Wind impact looks mixed rather than strongly favorable or strongly challenging across the full route.
What to wear & carry
Based on the start temperature, wind and rain risk.
- Throwaway top at the start
- Normal fluid plan likely fine
- No major rain gear needed
- Minimal extra gear needed
2026 vs. typical Marine Corps
Historical race-day comparison
| Conditions | 2026 forecast | Typical | Difference |
|---|---|---|---|
| Race average temp | 46°F | 57°F | -11° |
| Start temperature | 44°F | 51°F | -7° |
| Start humidity | 91% | 78% | +13% |
| Start wind speed | 3 mph | 7 mph | -4 mph |
| Start wind direction | N | N | — |
| Start conditions | Partly Cloudy | Sunny | More cloud cover |
